| 基于小波变换的地震相干体算法研究 |
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| 引用本文： | 王西文,杨孔庆,周立宏,王娟,刘洪,李幼铭.基于小波变换的地震相干体算法研究[J].地球物理学报,2002,45(6):847-852. |
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| 作者姓名： | 王西文 杨孔庆 周立宏 王娟 刘洪 李幼铭 |
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| 作者单位： | 1. 兰州大学物理系,兰州,730000;
2. 中国科学院地质与地球物理研究所,北京,100101 |
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| 基金项目： | 中国科学院知识创新工程重大项目 (KZCXL Y 0 1 )，国家自然科学基金和大庆石油管理局联合资助项目(4 98941 90 ) |
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| 摘 要： | 基于计算相干体算法,提出了用模拟地震子波的小波函数(或高分辨导数小波函数)的小波变换,得到分频瞬时相位,再计算相干体的相干体算法1和用小波变换得到的实、虚部(相当Hilbert变换)计算相干体的相干体算法2. 在油田构造解释中,为了突出小断层特征,用分频计算出的相干体进行重构. 实际资料计算表明,相干体算法2较K. J. Marfurt相干体算法抗噪声能力强;相干体算法1较相干体算法2在实际应用中效果更明显.
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| 关 键 词： | 地震子波 小波变换 瞬时相位 分频计算 重构相干体. |
| 文章编号： | 0001-5733(2002)06-0847-06 |
METHODS OF CALCULATING COHERENCE CUBE ON THE BASIS OF WAVELET TRANSFORM |
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| WANG XI-WEN,YANG KONG-QING,ZHOU LI-HONG,WANG JUAN,LIU HONG,LI YOU-MING.METHODS OF CALCULATING COHERENCE CUBE ON THE BASIS OF WAVELET TRANSFORM[J].Chinese Journal of Geophysics,2002,45(6):847-852. |
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| Authors: | WANG XI-WEN YANG KONG-QING ZHOU LI-HONG WANG JUAN LIU HONG LI YOU-MING |
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| Institution: | 1. Department of physics, Lanzhou University, Lanzhou 730000, China;
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | Two methods of calculating coherence cube are put forward in frequency division on the basis of wavelet transform, and methods of M. Bahorich and K. J. Marfurt. The first method is for calculating coherence cube by using instantaneous phase of wavelet transform of wavelet functions (or derivative wavelet functions) simulating seismic wavelet; The second method is for calculating coherence cube by using the real and imaginary parts of wavelet transform above-mentioned wavelet functions. In order to identify characteristics of small faults under in oilfield structure, the coherence cube is reconstructed by calculating coherence cube in frequency division. The first method is testified to be more efficient than the second in terms of the application of oilfield. |
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| Keywords: | Wavelet function Wavelet transform Instantaneous phase Calculating in frequency division Reconstructing coherence cube |
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